Owner's Manual

22 Installation Instructions and Important Information
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 5.
Driver Issue With Integrated 4-Port SATA Controllers
On some PowerEdge systems that have integrated 4-port SATA controllers,
I/O errors can occur when the system uses drives that support 48-bit logical
block addressing (lba48) with drives that do not support lba48.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 5.
System Time Might Become Inconsistent With Hardware clock
On certain PowerEdge systems running Red Hat Enterprise Linux 4, the
system time may not synchronize with the hardware clock.
A workaround for this problem is to use the kernel boot parameter nohpet in
/boot/grub/grub.conf or use network time protocol (NTP) to synchronize the
system time with a reliable time source.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 5.
Issues Fixed in Red Hat Enterprise Linux 4 Update 7
Wrong Processor Frequency Displayed With Red Hat Enterprise Linux 4 Update 5
On systems that are configured with an Intel Xeon 54XX processor and have
Demand Based Switching (DBS) enabled in the BIOS, the commands:
/proc/cpuinfo
and
/sys/devices/system/cpu/cpuX/cpufreq/scaling_cur_freq
where X is the number of processor cores, display the wrong processor frequency.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
System Fails to Boot When the PERC 5/E or PERC 5/I RAID Controller is Replaced
Replacing a Dell PERC 5/E or a PERC 5/I controller may cause the fsck utility
to fail when the system is turned on. If the fsck utility fails, you must enter
maintenance mode from the system console to manually run fsck. The system
may automatically enter maintenance mode after this type of failure.
A fix for this issue is available in Red Hat Enterprise Linux 4 Update 7.
RHELIIG.book Page 22 Thursday, April 14, 2011 12:15 PM